1 /*
2 * Copyright (C) 2009 Valentin Longchamp, EPFL Mobots group
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 */
14
15 #include <linux/delay.h>
16 #include <linux/gpio.h>
17 #include <linux/init.h>
18 #include <linux/interrupt.h>
19 #include <linux/i2c.h>
20 #include <linux/spi/spi.h>
21 #include <linux/slab.h>
22 #include <linux/platform_device.h>
23 #include <linux/types.h>
24
25 #include <linux/usb/otg.h>
26
27 #include "board-mx31moboard.h"
28 #include "common.h"
29 #include "devices-imx31.h"
30 #include "ehci.h"
31 #include "hardware.h"
32 #include "iomux-mx3.h"
33 #include "ulpi.h"
34
35 static unsigned int marxbot_pins[] = {
36 /* SDHC2 */
37 MX31_PIN_PC_PWRON__SD2_DATA3, MX31_PIN_PC_VS1__SD2_DATA2,
38 MX31_PIN_PC_READY__SD2_DATA1, MX31_PIN_PC_WAIT_B__SD2_DATA0,
39 MX31_PIN_PC_CD2_B__SD2_CLK, MX31_PIN_PC_CD1_B__SD2_CMD,
40 MX31_PIN_ATA_DIOR__GPIO3_28, MX31_PIN_ATA_DIOW__GPIO3_29,
41 /* dsPIC resets */
42 MX31_PIN_STXD5__GPIO1_21, MX31_PIN_SRXD5__GPIO1_22,
43 /*battery detection */
44 MX31_PIN_LCS0__GPIO3_23,
45 /* USB H1 */
46 MX31_PIN_CSPI1_MISO__USBH1_RXDP, MX31_PIN_CSPI1_MOSI__USBH1_RXDM,
47 MX31_PIN_CSPI1_SS0__USBH1_TXDM, MX31_PIN_CSPI1_SS1__USBH1_TXDP,
48 MX31_PIN_CSPI1_SS2__USBH1_RCV, MX31_PIN_CSPI1_SCLK__USBH1_OEB,
49 MX31_PIN_CSPI1_SPI_RDY__USBH1_FS, MX31_PIN_SFS6__USBH1_SUSPEND,
50 MX31_PIN_NFRE_B__GPIO1_11, MX31_PIN_NFALE__GPIO1_12,
51 /* SEL */
52 MX31_PIN_DTR_DCE1__GPIO2_8, MX31_PIN_DSR_DCE1__GPIO2_9,
53 MX31_PIN_RI_DCE1__GPIO2_10, MX31_PIN_DCD_DCE1__GPIO2_11,
54 };
55
56 #define SDHC2_CD IOMUX_TO_GPIO(MX31_PIN_ATA_DIOR)
57 #define SDHC2_WP IOMUX_TO_GPIO(MX31_PIN_ATA_DIOW)
58
marxbot_sdhc2_get_ro(struct device * dev)59 static int marxbot_sdhc2_get_ro(struct device *dev)
60 {
61 return !gpio_get_value(SDHC2_WP);
62 }
63
marxbot_sdhc2_init(struct device * dev,irq_handler_t detect_irq,void * data)64 static int marxbot_sdhc2_init(struct device *dev, irq_handler_t detect_irq,
65 void *data)
66 {
67 int ret;
68
69 ret = gpio_request(SDHC2_CD, "sdhc-detect");
70 if (ret)
71 return ret;
72
73 gpio_direction_input(SDHC2_CD);
74
75 ret = gpio_request(SDHC2_WP, "sdhc-wp");
76 if (ret)
77 goto err_gpio_free;
78 gpio_direction_input(SDHC2_WP);
79
80 ret = request_irq(gpio_to_irq(SDHC2_CD), detect_irq,
81 IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
82 "sdhc2-card-detect", data);
83 if (ret)
84 goto err_gpio_free_2;
85
86 return 0;
87
88 err_gpio_free_2:
89 gpio_free(SDHC2_WP);
90 err_gpio_free:
91 gpio_free(SDHC2_CD);
92
93 return ret;
94 }
95
marxbot_sdhc2_exit(struct device * dev,void * data)96 static void marxbot_sdhc2_exit(struct device *dev, void *data)
97 {
98 free_irq(gpio_to_irq(SDHC2_CD), data);
99 gpio_free(SDHC2_WP);
100 gpio_free(SDHC2_CD);
101 }
102
103 static const struct imxmmc_platform_data sdhc2_pdata __initconst = {
104 .get_ro = marxbot_sdhc2_get_ro,
105 .init = marxbot_sdhc2_init,
106 .exit = marxbot_sdhc2_exit,
107 };
108
109 #define TRSLAT_RST_B IOMUX_TO_GPIO(MX31_PIN_STXD5)
110 #define DSPICS_RST_B IOMUX_TO_GPIO(MX31_PIN_SRXD5)
111
dspics_resets_init(void)112 static void dspics_resets_init(void)
113 {
114 if (!gpio_request(TRSLAT_RST_B, "translator-rst")) {
115 gpio_direction_output(TRSLAT_RST_B, 0);
116 gpio_export(TRSLAT_RST_B, false);
117 }
118
119 if (!gpio_request(DSPICS_RST_B, "dspics-rst")) {
120 gpio_direction_output(DSPICS_RST_B, 0);
121 gpio_export(DSPICS_RST_B, false);
122 }
123 }
124
125 static struct spi_board_info marxbot_spi_board_info[] __initdata = {
126 {
127 .modalias = "spidev",
128 .max_speed_hz = 300000,
129 .bus_num = 1,
130 .chip_select = 1, /* according spi1_cs[] ! */
131 },
132 };
133
134 #define SEL0 IOMUX_TO_GPIO(MX31_PIN_DTR_DCE1)
135 #define SEL1 IOMUX_TO_GPIO(MX31_PIN_DSR_DCE1)
136 #define SEL2 IOMUX_TO_GPIO(MX31_PIN_RI_DCE1)
137 #define SEL3 IOMUX_TO_GPIO(MX31_PIN_DCD_DCE1)
138
marxbot_init_sel_gpios(void)139 static void marxbot_init_sel_gpios(void)
140 {
141 if (!gpio_request(SEL0, "sel0")) {
142 gpio_direction_input(SEL0);
143 gpio_export(SEL0, true);
144 }
145
146 if (!gpio_request(SEL1, "sel1")) {
147 gpio_direction_input(SEL1);
148 gpio_export(SEL1, true);
149 }
150
151 if (!gpio_request(SEL2, "sel2")) {
152 gpio_direction_input(SEL2);
153 gpio_export(SEL2, true);
154 }
155
156 if (!gpio_request(SEL3, "sel3")) {
157 gpio_direction_input(SEL3);
158 gpio_export(SEL3, true);
159 }
160 }
161
162 #define USB_PAD_CFG (PAD_CTL_DRV_MAX | PAD_CTL_SRE_FAST | PAD_CTL_HYS_CMOS | \
163 PAD_CTL_ODE_CMOS | PAD_CTL_100K_PU)
164
marxbot_usbh1_hw_init(struct platform_device * pdev)165 static int marxbot_usbh1_hw_init(struct platform_device *pdev)
166 {
167 mxc_iomux_set_gpr(MUX_PGP_USB_SUSPEND, true);
168
169 mxc_iomux_set_pad(MX31_PIN_CSPI1_MISO, USB_PAD_CFG);
170 mxc_iomux_set_pad(MX31_PIN_CSPI1_MOSI, USB_PAD_CFG);
171 mxc_iomux_set_pad(MX31_PIN_CSPI1_SS0, USB_PAD_CFG);
172 mxc_iomux_set_pad(MX31_PIN_CSPI1_SS1, USB_PAD_CFG);
173 mxc_iomux_set_pad(MX31_PIN_CSPI1_SS2, USB_PAD_CFG);
174 mxc_iomux_set_pad(MX31_PIN_CSPI1_SCLK, USB_PAD_CFG);
175 mxc_iomux_set_pad(MX31_PIN_CSPI1_SPI_RDY, USB_PAD_CFG);
176 mxc_iomux_set_pad(MX31_PIN_SFS6, USB_PAD_CFG);
177
178 mdelay(10);
179
180 return mx31_initialize_usb_hw(pdev->id, MXC_EHCI_POWER_PINS_ENABLED |
181 MXC_EHCI_INTERFACE_SINGLE_UNI);
182 }
183
184 #define USBH1_VBUSEN_B IOMUX_TO_GPIO(MX31_PIN_NFRE_B)
185 #define USBH1_MODE IOMUX_TO_GPIO(MX31_PIN_NFALE)
186
marxbot_isp1105_init(struct usb_phy * otg)187 static int marxbot_isp1105_init(struct usb_phy *otg)
188 {
189 int ret = gpio_request(USBH1_MODE, "usbh1-mode");
190 if (ret)
191 return ret;
192 /* single ended */
193 gpio_direction_output(USBH1_MODE, 0);
194
195 ret = gpio_request(USBH1_VBUSEN_B, "usbh1-vbusen");
196 if (ret) {
197 gpio_free(USBH1_MODE);
198 return ret;
199 }
200 gpio_direction_output(USBH1_VBUSEN_B, 1);
201
202 return 0;
203 }
204
205
marxbot_isp1105_set_vbus(struct usb_otg * otg,bool on)206 static int marxbot_isp1105_set_vbus(struct usb_otg *otg, bool on)
207 {
208 if (on)
209 gpio_set_value(USBH1_VBUSEN_B, 0);
210 else
211 gpio_set_value(USBH1_VBUSEN_B, 1);
212
213 return 0;
214 }
215
216 static struct mxc_usbh_platform_data usbh1_pdata __initdata = {
217 .init = marxbot_usbh1_hw_init,
218 .portsc = MXC_EHCI_MODE_UTMI | MXC_EHCI_SERIAL,
219 };
220
marxbot_usbh1_init(void)221 static int __init marxbot_usbh1_init(void)
222 {
223 struct usb_phy *phy;
224 struct platform_device *pdev;
225
226 phy = kzalloc(sizeof(*phy), GFP_KERNEL);
227 if (!phy)
228 return -ENOMEM;
229
230 phy->otg = kzalloc(sizeof(struct usb_otg), GFP_KERNEL);
231 if (!phy->otg) {
232 kfree(phy);
233 return -ENOMEM;
234 }
235
236 phy->label = "ISP1105";
237 phy->init = marxbot_isp1105_init;
238 phy->otg->set_vbus = marxbot_isp1105_set_vbus;
239
240 usbh1_pdata.otg = phy;
241
242 pdev = imx31_add_mxc_ehci_hs(1, &usbh1_pdata);
243
244 return PTR_ERR_OR_ZERO(pdev);
245 }
246
247 static const struct fsl_usb2_platform_data usb_pdata __initconst = {
248 .operating_mode = FSL_USB2_DR_DEVICE,
249 .phy_mode = FSL_USB2_PHY_ULPI,
250 };
251
252 /*
253 * system init for baseboard usage. Will be called by mx31moboard init.
254 */
mx31moboard_marxbot_init(void)255 void __init mx31moboard_marxbot_init(void)
256 {
257 printk(KERN_INFO "Initializing mx31marxbot peripherals\n");
258
259 mxc_iomux_setup_multiple_pins(marxbot_pins, ARRAY_SIZE(marxbot_pins),
260 "marxbot");
261
262 marxbot_init_sel_gpios();
263
264 dspics_resets_init();
265
266 imx31_add_mxc_mmc(1, &sdhc2_pdata);
267
268 spi_register_board_info(marxbot_spi_board_info,
269 ARRAY_SIZE(marxbot_spi_board_info));
270
271 /* battery present pin */
272 gpio_request(IOMUX_TO_GPIO(MX31_PIN_LCS0), "bat-present");
273 gpio_direction_input(IOMUX_TO_GPIO(MX31_PIN_LCS0));
274 gpio_export(IOMUX_TO_GPIO(MX31_PIN_LCS0), false);
275
276 imx31_add_fsl_usb2_udc(&usb_pdata);
277
278 marxbot_usbh1_init();
279 }
280
